CN201696172U

CN201696172U - Carbon tank without PCV interface

Info

Publication number: CN201696172U
Application number: CN2010201837970U
Authority: CN
Inventors: 徐雄健; 邵志强
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-05
Filing date: 2010-05-05
Publication date: 2011-01-05
Anticipated expiration: 2020-05-05

Abstract

The utility model discloses a carbon tank without a PCV interface, which comprises a tank body (5), a tank cover (18), a PVC control valve (6) and powdered carbon (17), wherein the upper part of the tank body (5) is provided with an adsorption hole (4) and a desorption hole (7); the adsorption hole (4) is communicated with a chamber of the tank body (5); the PVC control valve (6) comprises a valve core (19), a valve cover (20), a spring (15) and a mebrane (16) which are arranged in the middle of the tank body (5); the mebrane (16) is fixed at an upper hole of the tank body (5) by the valve cover (20); the spring (15) is positioned between the valve cover (20) and the mebrane (16); the center of the mebrane (16) is provided with a small circular hole which is communicated between the inside and the outside; a hard joint part in the middle of the mebrane (16) is matched with the outer ring of the valve core (19); and the valve core (19) is communicated with the desorption hole (7). By adopting the structure, the carbon tank without the PCV interface has the characteristics of simple structure, convenient connection and fixation, low cost, good adsorption effect and the like.

Description

The canister of no PCV interface

Technical field

The utility model relates to a kind of motorcycle accessory, particularly a kind of canister of motorcycle fuel evaporation desorption control gear.

Background technique

Reinforcement along with the environmental protection protection; requirement to motorcycle emission is also more and more higher, the country from July 1st, 2008 come into effect " motorcycle pollutant emission limit and method of measurement (operating condition method) " (GB14622-2007), " trail bike pollutant emission and method of measurement (operating condition method) " (GB18176-2007) and " motorcycle and trail bike fuel evaporation pollutant emission limit and method of measurement " (GB20998-2007).In order to reach the requirement of above-mentioned standard, take scheme as shown in Figure 4 at present: it comprises fuel tank 1, tank body 5, air filter 9, Carburetor 10, motor 12, between the adsorption port of fuel tank 1 and canister 5 by oily steam raising circuit 3 and topple over flow-stop valve 2 and be connected, Carburetor 10 1 ends are connected with air filter 9, the other end links to each other with motor 12 by suction tude 11, the PCV control valve 6 of described canister 5 and desorption mouth 7 are connected with two imports of tee union 8, the outlet of tee union 8 is connected with the desorption mouth of Carburetor 10, is provided with metering hole 13 between canister desorption mouth 7 and the tee union 8.When the fuel evaporation in the fuel tank 1, can in fuel tank 1, form vapor pressure, under certain pressure, steam along with evaporation route 3, topple over flow-stop valve 2, in adsorption port 4 enters canister 5, absorbed by active carbon.When motor 12 reaches certain rotating speed, diaphragm when the desorption mouth negative pressure of Carburetor 10 rises to certain pressure in the PCV control valve 6 is opened, metering hole 13 effects between canister desorption mouth 7 and the tee union 8 are that utilization front and back pressure reduction makes relatively stable the opening of diaphragm in the PCV control valve 6, the desorption mouth negative pressure of canister 5 makes extraneous air enter canister 5 from atmospheric air port 14 simultaneously, make the fuel-steam that is adsorbed in canister 5 active carbon carry out desorption, enter motor 12 burnings through Carburetor 10 and suction tude 11 again.But such scheme has the following disadvantages: complex manufacturing, install, detect inconvenient.

Summary of the invention

For overcoming the problems referred to above that existing canister exists, the purpose of this utility model provide a kind of simple and reasonable, desorption is effective, the canister of qualified discharge, the life-span is long, cost is low no PCV interface.

The technological scheme that its technical problem that solves the utility model adopts, it comprises tank body, cover, PCV control valve, carbon dust, the top of tank body is provided with adsorption port and desorption mouth, adsorption port is communicated with the chamber of tank body, described PCV control valve comprises spool, valve gap, spring, the diaphragm that is arranged on the tank body centre, diaphragm is fixed on the suitable for reading of tank body by valve gap, spring is arranged between valve gap and the diaphragm, the small sircle hole that is interlinked to the outside in the diaphragm center is provided with, match with the spool outer ring in hard joining portion, the centre of diaphragm, spool is communicated with the desorption mouth.

Hard joining portion, the centre of described diaphragm area is less than the outer ring portion's area that is flexible coupling.

Described cover is provided with atmospheric air port.

After adopting said structure, the utility model compared with prior art has following advantage and effect: the one, because the PCV control valve of canister does not have the PCV interface, diaphragm need not the diaphragm lid, and production technology is simple, controls more reliable; The 2nd, because no PCV interface, canister directly is connected with the desorption mouth of Carburetor, has not only saved tee union, PCV connecting tube, saves cost, and has simplified linkage structure, improves installation efficiency; The 3rd, need not to use tee union joint detection and PCV interface to detect, detect convenient; The 4th, connect simple and easyly, car load is more attractive in appearance.

Description of drawings

Structural representation when Fig. 1 adsorbs for the utility model.

Structural representation when Fig. 2 is the utility model desorption.

Fig. 3 is for adopting fuel evaporation desorption schematic flow sheet of the present utility model.

Fig. 4 is existing fuel evaporation desorption schematic flow sheet.

Embodiment

Shown in Figure 1, the specific embodiments of not having the canister of PCV interface for the utility model is a kind of, it comprises tank body 5, cover 18, PCV control valve 6, carbon dust 17, the top of tank body 5 is provided with adsorption port 4 and desorption mouth 7, adsorption port 4 is communicated with the chamber of tank body 5, described PCV control valve 6 comprises the spool 19 that is arranged on tank body 5 centres, valve gap 20, spring 15, diaphragm 16, diaphragm 16 is fixed on the suitable for reading of tank body 5 by valve gap 20, spring 15 is arranged between valve gap 20 and the diaphragm 16, the small sircle hole that is interlinked to the outside in diaphragm 16 centers are provided with, match with spool 19 outer rings in hard joining portion, the centre of diaphragm 16, spool 19 is communicated with desorption mouth 7.Hard joining portion, the centre of described diaphragm 16 area is less than the outer ring portion's area that is flexible coupling.Described cover 18 is provided with atmospheric air port 14.

When motor is not worked, diaphragm 16 is in closed state with spool 19 under spring 15 effects, be that PCV control valve 6 is in closed condition, the oil-air pressure that fuel oil produces in fuel tank 1, along evaporation route 3, topple over flow-stop valve 2, in adsorption port 4 enters tank body 5, absorbed by active carbon 17, discharge from atmospheric air port 14 at last, as shown in figures 1 and 3, thus finish absorption work.When motor 12 reaches certain rotating speed, the desorption mouth negative pressure of Carburetor 10 rises, this negative pressure is through connecting tube, desorption mouth 7, the small sircle hole at spool 19 and diaphragm 16 centers is delivered to the space of valve gap 20 and diaphragm 16 compositions, because hard joining portion, the centre area of diaphragm 16 is less than the outer ring portion's area that is flexible coupling, diaphragm 16 outer rings are flexible coupling upwards suction that portion produces greater than the downward suction in hard joining portion, centre of 19 pairs of diaphragms 16 of spool, open at the elastic force rear film 16 that overcomes spring 15, be that PCV control valve 6 is in open mode, tank body 5 makes extraneous air enter from atmospheric air port 14 under suction function, the fuel-steam that is adsorbed on tank body 5 carbon dusts 17 carries out desorption, enter motor 9 burnings through Carburetor 10 and suction tude 11 again, as shown in Figures 2 and 3, thus finish desorption work.

Claims

1. canister that does not have the PCV interface, comprise tank body (5), cover (18), PCV control valve (6), carbon dust (17), the top of tank body (5) is provided with adsorption port (4) and desorption mouth (7), adsorption port (4) is communicated with the chamber of tank body (5), it is characterized in that: described PCV control valve (6) comprises the spool (19) that is arranged on tank body (5) centre, valve gap (20), spring (15), diaphragm (16), diaphragm (16) is fixed on the suitable for reading of tank body (5) by valve gap (20), spring (15) is arranged between valve gap (20) and the diaphragm (16), the small sircle hole that is interlinked to the outside in diaphragm (16) center is provided with, match with spool (19) outer ring in the hard joining portion, centre of diaphragm (16), spool (19) is communicated with desorption mouth (7).

2. the canister of no PCV interface according to claim 1 is characterized in that: hard joining portion, the centre area of described diaphragm (16) is less than the outer ring portion's area that is flexible coupling.

3. the canister of no PCV interface according to claim 1 and 2 is characterized in that: described cover (18) is provided with atmospheric air port (14).